RUKO SPB-DIN1869-12,5mm-Serie-1 Shoulder Screw with Hexagon Socket and Collar, M10 Thread, 12.5 mm Shoulder Diameter, 25 mm Shoulder Length, High-Tensile Steel 10.9, Plain Finish

Precision machinery often requires pivot points and guide pins that can withstand high loads while maintaining exact alignment. The RUKO SPB-DIN1869-12,5mm-Serie-1 shoulder screw addresses this need with a precision-ground shoulder and high-tensile steel construction, ensuring reliable performance in demanding applications.

Who is it for

This shoulder screw is intended for engineers, machinists, and maintenance professionals who build or repair precision equipment, jigs, fixtures, and roller assemblies. It suits applications where a smooth, accurately sized bearing surface is essential for rotating or sliding components.

Main features

• Precision-ground shoulder diameter of 12.5 mm with tolerance h6/h7 for consistent fit.
• High-tensile steel grade 10.9 provides high strength and resistance to shear loads.
• Hexagon socket drive with 8 mm key size for secure tightening.
• Plain self-color finish offers corrosion resistance suitable for indoor use.
• Conforms to DIN 1869 standard for shoulder screws with hexagon socket and collar.

Specifications

• Standard: DIN 1869
• Type: Shoulder Screw with Hexagon Socket and Collar
• Shoulder Diameter (d1): 12.5 mm
• Thread Diameter (d): M10
• Thread Pitch: 1.5 mm (Metric Coarse)
• Shoulder Length (l1): 25 mm
• Total Length (l): 33 mm (under head)
• Head Diameter (dk): 20 mm
• Head Height (k): 8 mm
• Hex Socket Size (s): 8 mm
• Material: High-Tensile Steel
• Material Grade: 10.9
• Surface Finish: Plain / Self-Color
• Shoulder Tolerance: h6 / h7 (Precision Ground)
• Application: Guide pins, pivot points, roller shafts, precision machinery

Tips

When installing, ensure the shoulder is fully seated against the mating surface to avoid bending stresses on the thread. Use a torque wrench calibrated for M10 grade 10.9 fasteners to prevent over-tightening. For applications requiring frequent disassembly, consider applying a light machine oil to the threads to prevent galling.